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Username Post: Info on lightest clutch pedal possible        (Topic#361408)
Valued Contributor
Posts: 3142
Loc: Chesapeake,VA,
Reg: 04-22-02
06-17-20 09:52 AM - Post#2796572    

I know it's not the '56 wagon but I need your help. We are looking to install a maximum force clutch in my daughter's 69 Z28. Because of a severe injury to her lower left leg, the car is very, very uncomfortable for her to drive but she wants to be able to enjoy the car in its 4 spd configuration (M22 - 4.10 posi).

We are putting in a newly-built date/numbers matching 302DZ to replace the incorrect 302 in the car now. Original clutch is 10.5, 10 spline. The flywheel was resurfaced and balanced just a short time ago so we'd like to retain it.

Please recommend a suitable assembly. We're considering the dual disc Centerforce but need input from folks who know a lot more than we do.



Original builder of the Gobstomper - '56 210 9 passenger wagon now in other's hands. Current Ride is '69 X33D80 Z28 Camaro


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Loc: Baltimore, MD
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06-17-20 02:34 PM - Post#2796596    
    In response to vabeach56wagon

Sorry to hear your daughter got injured. Good that she still wants to keep the car a stick though. There are probably a lot of people on here that know more about this subject than I do, but my suggestion would be to consider going to a hydraulic clutch setup. All stick cars for years have had them and they are much easier to drive than the old iron.

Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier

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Posts: 27748
Loc: Katy, Tx, USA
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06-17-20 06:15 PM - Post#2796603    
    In response to wagonman100

A hydraulic clutch isn't going to be any different from a mechanical linkage as long as the clutch pedal travel is the same. At least provided both work as intended. This is a matter of leverage - if you want less pedal force you have to have more pedal travel. You only have so much room to provide that, and your leg and body can only accommodate about what's there anyway.

The stock clutch assist spring is an over center device and helps reduce pedal effort when the pedal is depressed more than halfway. But its effect is somewhat minimal. If it were made stronger the pedal would want to stick on the floor too.

Valued Contributor
Posts: 3142
Loc: Chesapeake,VA,
Reg: 04-22-02
06-18-20 07:08 AM - Post#2796645    
    In response to wagonman100

We have considered going hydraulic clutch however this is an original x33D80 Z28 and we would like to retain the visual "correctness" aspect of the car. Drivetrain mechanical internals are not at all stock but all elements otherwise remain as original in appearance as is humanly possible.

New 302DZ engine (block and heads were cast in May '69 - car built in June '69) has Eagle forged crank and rods, JE forged .030 over 11-1 pistons, Comp regrind of the factory 30-30 cam and the heads have screw-in studs and pushrod guides, comp roller tip steel rocker arms...the M22 is a new build transmission but is date and stampings correct.

Rear posi is not factory, nor is ring/pinion. All new.

Clutch linkage has to remain.


Original builder of the Gobstomper - '56 210 9 passenger wagon now in other's hands. Current Ride is '69 X33D80 Z28 Camaro

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Loc: No. Virginia
Reg: 01-18-13
06-18-20 01:22 PM - Post#2796671    
    In response to vabeach56wagon

The below may be donkey doo. But it makes some sense to me.

Take a look thru this topic:


The clutch with the 'short' diaphragm fingers might (logically should) have a 'lighter' pedal. The diaphragm spring should be 'lighter' than the 'long' fingered versions. It won't 'perform' like a 'proper' one, but it may work if not ridden hard.

It's been a LOOOOOONG time since I drove one of those 'short' type clutches (50+ years) and I do not remember enough to make any reliable comparisons.

One of the guru's on manual trans missions is DZAUTO. Perhaps he can provide reliable info on your problem. Send him a PM; he helped me on a different issue.



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